Patents by Inventor Allan L. Carlson

Allan L. Carlson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for fixating sludges and soils contaminated with mercury and other heavy metals
    Patent number: 6911570
    Abstract: The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the particulate material. The method generally involves the application of a metal reagent, a sulfur-containing compound, and the addition of oxygen to the particulate material, either through agitation, sparging or the addition of an oxygen-containing compound.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: June 28, 2005
    Assignee: ADA Technologies, Inc.
    Inventors: Thomas E. Broderick, Rachel L. Roth, Allan L. Carlson
  • Method for fixating sludges and soils contaminated with mercury and other heavy metals
    Publication number: 20020106317
    Abstract: The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the particulate material. The method generally involves the application of a metal reagent, a sulfur-containing compound, and the addition of oxygen to the particulate material, either through agitation, sparging or the addition of an oxygen-containing compound.
    Type: Application
    Filed: November 28, 2001
    Publication date: August 8, 2002
    Inventors: Thomas E. Broderick, Rachel L. Roth, Allan L. Carlson